export function fileDownload (fileAdd, filename) {
    let blob = new Blob([fileAdd], {
      type: 'application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
    })
    if (window.navigator.msSaveOrOpenBlob) {
      navigator.msSaveBlob(blob)
    } else {
      let elink = document.createElement('a')
      elink.download = filename
      elink.style.display = 'none'
      elink.href = URL.createObjectURL(blob)
      document.body.appendChild(elink)
      elink.click()
      document.body.removeChild(elink)
    }
  }

  export function downFile(imgsrc, name) { //下载图片地址和图片名
    let image = new Image();
    // 解决跨域 Canvas 污染问题
    image.setAttribute("crossOrigin", "anonymous");
    image.onload = function () {
      let canvas = document.createElement("canvas");
      canvas.width = image.width;
      canvas.height = image.height;
      let context = canvas.getContext("2d");
      context.drawImage(image, 0, 0, image.width, image.height);
      let url = canvas.toDataURL("image/png"); //得到图片的base64编码数据
      let a = document.createElement("a"); // 生成一个a元素
      let event = new MouseEvent("click"); // 创建一个单击事件
      a.download = name || "photo"; // 设置图片名称
      a.href = url; // 将生成的URL设置为a.href属性
      a.dispatchEvent(event); // 触发a的单击事件
    };
    image.src = imgsrc;
  }
